Using git with multiple repositories

Hi,

I'm working on a project that has organized parts of its website into entire "mini applications" that are stored in the /vendor/plugins directory of the main application - let's call it "main".

For example, main/vendor/plugins/app_a is a full-fledged Rails app in the sense that it has an app/controllers, app/helpers, app/views, config, db, lib, etc. directories. Being a complete, "mini app" It also has its own /vendor/plugins directory.

Similarly, there is a main/vendor/plugins/app_b, and app_c, etc.

Each of these mini-apps has its own git repository from which to push and pull changes, i.e. there is a .git directory containing git information for the mini-app.  For example, this would be the entry that app_a has  in its .git/config file:
[remote "origin"]
    url = ssh://abc-dev/var/git/plugins/app_a.git
    fetch = +refs/heads/*:refs/remotes/origin/*

Similarly, app_b and app_c would have something like the following in each of their own .git/config files:
[remote "origin"]
     url = ssh://abc-dev/var/git/plugins/app_b.git
     fetch = +refs/heads/*:refs/remotes/origin/*
- AND -
[remote "origin"]
     url = ssh://abc-dev/var/git/plugins/app_c.git
     fetch = +refs/heads/*:refs/remotes/origin/*

They set this up manually from the command line (they're Mac guys), so on my Linux laptop I have a "main" app with its own .git directory that contains "/vendor/plugins/app_a" with its own .git directory, and "/vendor/plugins/app_b" with its own .git directory, and "/vendor/plugins/app_c" with its own .git directory, etc.

Here is my question: How can I set up RubyMine so that it works with these different git repositories? For example, if I make changes within the "app_a" application I'd like to be able to push those changes to the "app_a" repository. And when I want to pull changes into the "app_b" application I'd like to be able to fetch those changes from the corresponding "app_b" repository.

This is the first time I have seen a project organized like this, but am told it is a pretty standard way, therefore I'm hoping there's a way to specify the correct plumbing within RubyMine.

Thanks,
Larry